The Union Bank of California Tower is an 82 m (269 ft), 15-story office building completed in 1969 in downtown Portland, Oregon. The tower was designed by the firm of Anshen and Allen of San Francisco in the International-style, with a strong presence on Broadway. The most prominent feature of the Union Bank of California are its exposed service cores, clad in light gray slate with a greenish tint. It is said that the slate was quarried from the same area in Wales as the stone used in Stonehenge.[4]

The building is owned by both Melvin Mark Companies and Downtown Development Group, and has approximately 200,000 square feet (19,000 m2) above ground.[5] In 2012, the owners turned a subbasement level into a fourth level of underground parking, increasing the number of parking spaces by 84 for a total of 339.[5]